NtAllocateUserPhysicalPagesEx - NtDoc

#ifndef _NTMMAPI_H
//
// User physical pages
//
#if (PHNT_MODE != PHNT_MODE_KERNEL)
#if (PHNT_VERSION >= PHNT_WINDOWS_10)

/**
 * Allocates physical memory pages to be mapped and unmapped within any Address Windowing Extensions (AWE) region of a specified process, with extended parameters.
 *
 * @param ProcessHandle A handle to the process whose physical memory pages are to be allocated within the virtual address space of this process.
 * @param NumberOfPages The size of the physical memory to allocate, in pages.
 * @param UserPfnArray A pointer to an array to store the page frame numbers of the allocated memory. Do not attempt to modify this buffer. It contains operating system data, and corruption could be catastrophic. The information in the buffer is not useful to an application.
 * @param ExtendedParameters Pointer to an array of MEM_EXTENDED_PARAMETER structures.
 * @param ExtendedParameterCount The number of MEM_EXTENDED_PARAMETER in the ExtendedParameters array.
 * @return NTSTATUS Successful or errant status.
 * @sa https://learn.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-allocateuserphysicalpages
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtAllocateUserPhysicalPagesEx(
    _In_ HANDLE ProcessHandle,
    _Inout_ PULONG_PTR NumberOfPages,
    _Out_writes_(*NumberOfPages) PULONG_PTR UserPfnArray,
    _Inout_updates_opt_(ExtendedParameterCount) PMEM_EXTENDED_PARAMETER ExtendedParameters,
    _In_ ULONG ExtendedParameterCount
    );

#endif
#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwAllocateUserPhysicalPagesEx(
    _In_ HANDLE ProcessHandle,
    _Inout_ PULONG_PTR NumberOfPages,
    _Out_writes_(*NumberOfPages) PULONG_PTR UserPfnArray,
    _Inout_updates_opt_(ExtendedParameterCount) PMEM_EXTENDED_PARAMETER ExtendedParameters,
    _In_ ULONG ExtendedParameterCount
    );

#endif
View code on GitHub